Chain of custody receipt

Source #6466

Cryptographic attestation that the document below was captured in Goblin House's archive at the timestamp shown, with the hash listed. If the original URL goes dark or its content changes, this receipt remains as evidence of what the public record looked like at capture time.

TitleThe Lab @ DC study published in 2017
Original URLhttps://www.researchgate.net/publication/351232261_Police_Body-worn_Cameras_and_Axon_Enterprise's_Claims_in_Media
PublicationDirected Inquiry — Web Search
Source typeweb_search
Date2017-10-20
EntityAxon Enterprise
Captured2026-04-13T04:17:29.839Z UTC
Hash computed at2026-04-13T04:17:29.839Z UTC
SHA-256ed7cfe4598c950d31ca7320d97e0d9cd5cbd54291919f8329072c2f3fdd2ecce
Content length214 bytes
Content preview (first 800 chars) 
The largest randomized controlled trial of body cameras in Washington DC with 2,224 officers found no statistically significant differences in use of force, citizen complaints, police activity, or judicial outcomes

Verifying this receipt

The hash above was computed as:

sha256( coalesce(url, '<no-url>') || '\n' || raw_content )

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  1. Take the URL field and the original document content.
  2. Concatenate url + '\n' + content and SHA-256 it.
  3. Compare to the SHA-256 row above.

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  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/6466/receipt.json